Abstract
Polyphenylacetylene (PPA) is an interesting material because of its applications 1,2 and properties 3. The structure of PPA is still object of investigation by different techniques; laser ionization mass spectrometry gives characteristic fragmentation ion patterns which can be useful in the polymer structural studies. Formation of high-mass carbon clusters C n up to n ≅ 600, of dimers, positive and negative fragment ions is observed. The negative ion spectrum of iodine doped PPA reveals the presence of free I 3 − and of fragments bonded to iodine poliiodides. The results will be discussed in comparison with data already reported for analogous reference molecules 4.
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